chore: switch to eslint flat config and run prettier separately

Author: henri-hulski

.eslintignore

@@ -5,5 +5,3 @@ package.json
 **/es
 **/build
 **/coverage
-node_modules
-*.md

.eslintrc.json

@@ -5,9 +5,6 @@
 
   "arrowParens": "always",
   "overrides": [
-    {
-      "files": "packages/node_modules/**/*"
-    },
     {
       "files": "*.md",
       "options": {

.prettierignore

@@ -0,0 +1,79 @@
+// @ts-check
+
+import globals from 'globals'
+import tseslint from 'typescript-eslint'
+import js from '@eslint/js'
+import eslintConfigPrettier from 'eslint-config-prettier/flat'
+
+export default tseslint.config(
+  {
+    ignores: [
+      'packages/*/**/lib/',
+      'packages/*/**/es/',
+      'packages/*/**/dist/',
+      '**/build/',
+      '**/*.min.js',
+      '**/bundle.js',
+      '**/coverage/',
+      '**/vendor/',
+    ],
+  },
+  js.configs.recommended,
+  {
+    plugins: {
+      '@typescript-eslint': tseslint.plugin,
+    },
+    languageOptions: {
+      globals: {
+        ...globals.browser,
+        ...globals.node,
+        ...globals.mocha,
+      },
+      ecmaVersion: 2022,
+      sourceType: 'module',
+      parser: tseslint.parser,
+      parserOptions: {
+        ecmaVersion: 2022,
+        projectService: true,
+        projectFolderIgnoreList: [
+          '!packages/node_modules/**',
+          'packages/*/**/node_modules/**',
+        ],
+      },
+    },
+    linterOptions: {
+      reportUnusedDisableDirectives: 'error',
+    },
+    rules: {
+      'linebreak-style': ['error', 'unix'],
+      '@typescript-eslint/no-unused-vars': [
+        'error',
+        {
+          args: 'after-used',
+          argsIgnorePattern: '^_',
+          caughtErrors: 'all',
+          caughtErrorsIgnorePattern: '^_',
+          destructuredArrayIgnorePattern: '^_',
+          varsIgnorePattern: '^_',
+          ignoreRestSiblings: true,
+        },
+      ],
+      '@typescript-eslint/no-explicit-any': 'off',
+      'no-unused-vars': 'off',
+      'import/export': 'off',
+      'no-dupe-class-members': 'off',
+      'no-empty-pattern': 'off',
+      'no-redeclare': 'off',
+      'no-undef': 'off',
+      'no-unused-expressions': 'off',
+      'no-use-before-define': 'off',
+      'no-useless-constructor': 'off',
+    },
+  },
+  eslintConfigPrettier,
+  {
+    // disable type-aware linting on JS files
+    files: ['**/*.{js,cjs,mjs,jsx}'],
+    extends: [tseslint.configs.disableTypeChecked],
+  }
+)

.prettierrc

@@ -9,10 +9,10 @@
     "commit": "git-cz",
     "commit-msg": "cz-customizable-ghooks",
     "fixdeps": "repo-cooker --fix-dependencies",
-    "format": "npm run lint -- --fix && prettier --write \"**/*.md\" \"**/*.json\"",
+    "format": "eslint --fix . && prettier --write .",
     "install": "npm run link && npm run build",
     "link": "repo-cooker --link",
-    "lint": "eslint \"**/*.js\" \"**/*.ts?\"",
+    "lint": "eslint . && prettier --check .",
     "lint-staged": "lint-staged",
     "prepare": "husky",
     "release": "repo-cooker --release",
@@ -97,7 +97,10 @@
     "webpack-merge": "6.0.1"
   },
   "lint-staged": {
-    "*.{js,ts,tsx}": "eslint --fix",
+    "*.{js,ts,tsx}": [
+      "eslint --fix",
+      "prettier --write"
+    ],
     "*.{md,css,json}": "prettier --write"
   },
   "config": {